SKF 7044ACD/P4A Angular contact ball bearings,SKF 7044 ACD/P4A Super-precision bearings-BEARINGPOWER Co.,Ltd.
Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 7044 ACD/P4A

7044 ACD/P4A

Dimensions
d 220mm
D 340mm
B 56mm
d1 257mm
d2 257mm
D1 303mm
r1,2min.3mm
r3,4min.1.5mm
a 93.6mm
Abutment dimensions
damin.233mm
dbmin.233mm
Damax.327mm
Dbmax.334mm
ramax.2.5mm
rbmax.1.5mm
dn 267.1mm
Calculation data
Basic dynamic load ratingC 319kN
Basic static load ratingC0 440kN
Fatigue load limitPu 11kN
Attainable speed for grease lubrication  3600r/min
Attainable speed for oil-air lubrication  5300r/min
Ball diameterDw 38.1mm
Number of ballsz 21 
Reference grease quantityGref 201cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class AGA 2000N
Static axial stiffness, preload class A  546N/µm
Preload class BGB 4000N
Static axial stiffness, preload class B  710N/µm
Preload class CGC 8000N
Static axial stiffness, preload class C  935N/µm
Preload class DGD 16000N
Static axial stiffness, preload class D  1254N/µm
Calculation factors
Calculation factorf 1.13 
Calculation factorf1 0.99 
Calculation factorf2A 1 
Calculation factorf2B 1.02 
Calculation factorf2C 1.05 
Calculation factorf2D 1.08 
Calculation factorfHC 1 
Calculation factore 0.68 
Calculation factor (single, tandem)Y2 0.87 
Calculation factor (single, tandem)Y0 0.38 
Calculation factor (single, tandem)X2 0.41 
Calculation factor (back-to-back, face-to-face)Y1 0.92 
Calculation factor (back-to-back, face-to-face)Y2 1.41 
Calculation factor (back-to-back, face-to-face)Y0 0.76 
Calculation factor (back-to-back, face-to-face)X2 0.67 
Mass
Mass bearing  16.1kg
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Hot number: 17134 32510 30326/DF 51312 71912 ACB/HCP4A 81114 TN 86737 AHX 318 BEAS 025057-2RZ HME 31/630 NUP 228 ECML PWM 253030 S7024 ACE/HCP4A SILQG 20 ES WBB1-8709

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